#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<math.h>
int main()
{
	double dx = 1.0*exp(-13);
	double x = 0.0;
	double y = 0.0;
	double squa = 0.0;
	for (x = 1; x < 2; x += dx)
	{
		double y = 1.0 / (pow(x, 2) + 4 * x);
		squa += (dx * y);
	}
	printf("%lf", squa);
	return 0;
}